I labelled the inner lenses "A" and "B" and took the same picture with each configuration:

..."A".."B"...
() )( S )( ()

and

..."B".."A"...
() )( S )( ()

Pictures are a bit rough - but they are typical of how I plan to use the lens...
A-B:
http://www.flickr.com/photos/9314116@N06/9500602365/
A-B Crop:
http://www.flickr.com/photos/9314116@N06/9500604501/

B-A:
http://www.flickr.com/photos/9314116@N06/9500616557/
B-A Crop:
http://www.flickr.com/photos/9314116@N06/9503419936/

Yes - I should have used a static scene. There is variation due to the model moving between shots.